Railway motor



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R. E. HELLMUND RAILWAY MOTOR Filed 00?.. 24. 1923 lsz. a if* INVENTORPatented Oct. 13, 1925.

UNITED STATES PATENT OFFICE.

RUDOLF E. HELLMUND, OF SWISSVALE, PENNSYLVANIA, ASSIGNOR IO TESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

RAILWAY MOTOR.

Application led October 24, 1923.

To all whom t may concern.'

Beit known that I, RUDOLF E. Hamai UND, a citizen of the United States,and a resident of Swissvale, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in RailwayMotors, of which the following is a specification.

My invention relates to `electric railway motors and has particularrelation to bipolar-motor construction.

The introduction of the ventilated motor in railway service, and theexperiencc met with during snow storms, makes a railway motor having aminimum number of coils and other electrical parts, such as connect-ingleads which are subject to insulation breakdowns, especially desirable.It is also desirable to have such parts located as far away from thebottom of the motor as possible.

A bipolar motor provided with two main. field coils and a singlecommutating coil would serve to overcome the above difficulty but wouldnormally require such large magnetic frame sections' as would be tooheavy to employ for commercial railway opera-tion.

The principal object of my invention is to provide abipolar-railway-motor structure to overcome the above diiculty by havinga heavy magnetic section carrying the major portion of the flux on thesuspension side of the frame, opposite the railway axle, and having twosmall m etic sections on the axle side, the motoraiiving two main polepieces located respectively above and below the armature and a singlecommutating pole located on the suspension side.

Another object of my invention is to provide a railway motor wherein thegear-center distances will be reduced to a minimum, the railway axlebeing located partially within the interior of the motor frame, andmeans being provided for collecting and draining oil from the axlebearings.

A further object is to provide a railwaymotor mounting that will providea relative ly large clearance space thereunder.

Other objects of my invention are to pro- Vide a compact, simple,practical and relatively inexpensive structure of the above classwherein the air inlet is located to the best advantage.

Vith the foregoing and other objects in view, my invention consists inthe details and combinations herein described and Serial N0. 670,454.

claimed and illustrated in the accompanying drawing, wherein Figure l isa view in transverse section through the motor, on the line l-l oi Fig.2, and

Fig. 2 is a view in longitudinal section through the frame thereof, onthe liuc H-II of Fig. l.

Referring to the drawing, the niuneral l designates a wheel ot' a cartruck mounted upon an axle 2, and the numeral 3 designates a transversemotor-suspension bar cari-iet by the truck.

The motor, which is geared to the axle il by the usual means7 (notshown) is shown i as a. commutator motor comprising an arma.- ture 4mounted within suitable bearings at the ends of the frame 5 andoperating between laminated pole pieces G carried, rcspectively, by theupper and lower walls T ci the frame. The pole pieces are energized bycoils S mounted thereon and are so disposed that the gap between thesaine and the side of the frame toward the wheel axle is less than thaton the opposite or suspension side. A laminated interpole piece 9extends from the suspension side wall l0 ol the frame and has a coil 1ldisposed thereon.

Thel upper and lower walls T oi the motor frame 5 gradually decrease incross section from the suspension side wall l() toward the opposite sidewall l()n adjacent the car-wheel axle.

The frame is rigidly attached to the .snspension bar 3 by its wall l0,which is a iiai plate of uniform thickness throughout, constituting aheavy magnetic section between the poles.

The wall 10a of the frame, adjacent the car axle, is provided, at eachend, with a i' bearing bracket l2, having a cap 13 bolted thereto. Thewall l0:1 ou the axle side is oi lighter section than the wall l0 ou thesuspension side and comprises two portions 1.4.

that terminate near the axle bearing to carry 1 the magnetic flux nearthe axle, the opening 15 between the portions 14 preventing excessiveflux leakage from the frame to the armature. The wall lO"L also carriesa sheetmetal covering 16 which extends about the. outer portion of theaxle over the opening 15 to prevent the entry of dust or dirt to theframe.

To prevent the entry of oil from the axle 2 to the frame and consequentinjury to the lower field coil, an inwardly and upwardly extending lip17 is provided at the lower part of the wall 14 to extend a suflicientdistance over the coil to direct the oil out through 'one or more drainopenin 18.

An air inlet 19 is located in the wall 10 of the frame above the axle.To event the entrance of snow, a sheet-metal op erlike cover 19", openat the top, is attac d to the outside of the wall, also a late 20extends across the upper part of tie vinlet to cause the air to descendto the bottom of the inlet, as indicated by the arrows 20A and 20B inFig. 1. A transversely disposed bent plate 21 is secured within andacross the inlet, leaving an open space 22 at one end thereof throughwhich the air passes, in a horizontal direction, tol the interior motorspace adjacent the commutator, as indicated by the arrow 22C in Fig. 2.

A suitable fan (not shown) may be located at the other end of the frameon the arma ture shaft to create a circulation of the air that entersthe inlet opening 19.

While I have shown and described a certain embodiment of my invention, Idesire that such embodiment shall be regarded as illustrative only, andthat the appended claims shall be accorded the broadest constructionconsistent with the prior art.

I claim as my invention:

1. A bipolar railway motor comprising an armature and a field frame, thelatter having two main pole members respectively located above and belowthe armature, means for supporting a railway axle at one side of theframe, means for suspending the frame at the opposite side thereof, anda single commutating pole member located on the suspension side thereof.

Y 2. A bipolar motor frame comprising a heavy magnetic section on theone side and two smaller sections on the opposite sidei 3. A bipolarrailway motor comprising a frame having a' heavy magnetic section on theone side and two smaller sections on the opposite side and an openingbetween said smaller sections, and an axle disposed adjacent said twosmaller sections.

4. A bipolar railway motor comprising an armature and a field frame, thelatter havin a heavy magnetic section on one side thereo two smallermagnetic sections on the opposite side and a space therebetween, meansfor suspending said frame at the irstanentioned side, car-wheel-axlebearings at said second-mentioned side, two main pole mem'- bersrespectively located above and below the armature, and a singlecommutating pole vmember located at the suspension side of the frame.

5. A bipolar railway motor comprising an armature and a field frame, thelatter having .a heavy etic section on one side thereof, two sma rmagneticstions on the opposite side and a space therebetween,

means for sus ending said frame at the irstmentioned si e, `and ineensfor mounting 'a car-wheel axle'adjacent saidtwosmaller sections.

6. In combination with a railway motor frameybearings adapted to supporta railway-wheel axle projecting partlally into the-1` interior motorspace, andY l means' for Acols; lecting oil from ythe-axle bearing andfor-discharging the same from themotor frame.

7. In combination with a railwaymotor4V frame, bearings adapted tosupport a railwg, y,

wheel axle and proJecting partially into@ e,

interior of the motor frameyend means for dissymmetrcally concentratingthe weightj of the motor toward the side opposite said axle.

8. In combination with a railway motor .of the commutator type, meansfoi` mount ing a railway-wheel axle adjacent one side ot the motor, themotor frame having an opening above said axle,- a bale means for Idirecting air downwardly toward said opening,` and baffle means withinsaid frame fon directing the air horizontally' toward the interior motorspace near the commutator.

9. A railway motor comprising a vframe having one side mounted adyacenta railway-A wheel axle, an air inlet in said sideO;

frame above said axle, and meins for recting the air downwardly toward-`let and then transversely within said au* 10. A bipolar railway motorcom riiiiga frame having ytwo main pole mem rs,o`n` located above andthe other below,-each provided with a coil, a single Commutating polemember at one side thereof, and means a` the other side for supporting-a railwzg' wheel axle andfor directingoil from axle away from the lowercoil.

11. A bipolar rallway motor comprisin'glffil,E

frame having a suspension means at one side and a railway-wheel axle atthe ofh side, a heavy magnetic section at the spension side thereof, acom-mutater member on said section provided wit -a coil, a pair posed atthe of the frame and each provided-with asaid frame having two smallermagnetic sec`- of main pole members, one diaftop and theater at eheboadmY tions disposed on the axle side thereof, with a space therebetween andhaving an air inlet above said axle, and inlet for directing theincoming airdownwardly and then horizontally into" said frame.

In testimony whereof, `I have hereunto subscribed my name this 20th dayof Dctcber, 1923. v

RUDOLF E.

means at said' air n.. A .h Liang.; r Lela; n Zani.; L ,linnn-...WAL

